Is it legal for a merchant to subscribe a person to a service, and start charging them periodically, without that person's explicit agreement?
For example, suppose Netflix happens to have your credit card number, but you are currently not purchasing anything from them and have no membership. One day Netflix releases a new $10/mo plan, and decides that you would really like being on this plan. All this without asking you first - in fact, you only discover it months later when you notice the charge on your card statement.
In terms of contract law, it seems to me like Netflix has no basis for expecting you to pay the subscription fee, because a contract cannot be said to have formed without consideration on your part.
The problem is that they are not demanding that you pay the fee. They can just go ahead and charge it to your card. The burden then rests on you to prove that you never agreed to this subscription, and ask for a refund.
In a situation like this, what law (if any) would the merchant be breaking by charging a small subscription fee to someone's card without their agreement? What process is available to someone on the receiving end of this - would they have to go to small claims court and would they be expected to produce evidence that they didn't agree to the subscription (proving a negative)?